JP2020059506A - Bag-making and packaging machine - Google Patents

Abstract

To provide a bag-making and packaging machine with low operator workload.SOLUTION: A bag-making and packaging machine includes a film supply part that supplies a film to a bag-making and packaging part. The film supply part includes a plurality of holding mechanisms 110a and 110b having shafts 111a and 111b that hold a film roll; a holding mechanism support frame 120 that supports the holding mechanisms; a moving mechanism that rotates the holding mechanism support frame to move each holding mechanism between a film roll setting position and a film supply position in which the film is fed from the film roll to the bag-making and packaging part; a splicing mechanism for splicing a trailing end portion of the film of the film roll of one of the holding mechanisms and a leading end portion of the film of the film roll of the other holding mechanisms; and a film feeding mechanism 116 that rotates the shafts of the holding mechanisms to feed the film independently for each other from the film rolls attached to the shafts of the respective holding mechanisms and changes feeding speed of the film during bag-making and packaging.SELECTED DRAWING: Figure 6

Description

  TECHNICAL FIELD The present invention relates to a bag making and packaging machine, and more particularly to a bag making and packaging machine for producing a bag filled with an article to be packaged by forming a sheet-like film fed from a film supply section into a bag shape in the bag making and packaging section. .

  BACKGROUND ART Conventionally, there is known a bag making and packaging machine that forms a sheet-shaped film fed from a film supply section into a bag shape in a bag making and packaging section to produce a bag filled with an object to be packaged. In such a bag-making packaging machine, as in Patent Document 1 (JP 2008-127091A), a plurality of film rolls around which a packaging film is wound are held and used. When the film is used up, the end of the film is automatically joined to the beginning of the new film roll for replacement, and the film supply unit that starts supplying the film of the new film roll to the bag making packaging unit May be used. By using such a film supply unit, the operator does not need to manually set the film roll at the timing when the film roll is used up, and an efficient bag-making packaging machine with a short down time for film roll exchange can be provided. realizable.

  However, in the bag making and packaging machine of Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-127091), the position at which the film roll is set differs depending on the shaft that rotatably holds the film roll, which increases the work load on the operator. There is a problem that it is easy.

  An object of the present invention is to provide a bag making and packaging machine that reduces the work load on the operator.

  A bag making and packaging machine according to a first aspect of the present invention includes a bag making and packaging unit and a film supply unit. The bag-making and packaging unit forms a sheet-shaped film into a tubular shape, seals the tubular-shaped film, and forms into a bag-like shape. The film supply unit holds a film roll around which a sheet-shaped film is wound, and supplies the film delivered from the film roll to the bag making and packaging unit. The film supply unit has a plurality of film roll holding mechanisms, a frame, a frame shaft, a moving mechanism, a joining mechanism, and a film feeding mechanism. Each of the plurality of film roll holding mechanisms has a shaft on which a film roll is mounted and which rotatably holds the mounted film roll. The frame supports a plurality of film roll holding mechanisms. The frame shaft rotatably supports the frame. The moving mechanism rotates each frame to move each film roll holding mechanism between at least a first position and a second position different from the first position. In the first position, the shaft is loaded with the film roll. In the second position, the film is fed from the film roll mounted on the shaft to the bag making and packaging section. The joining mechanism was wound around the end portion of the film wound on the film roll mounted on the shaft of one film roll holding mechanism and on the film roll mounted on the shaft of the other one film roll holding mechanism. The starting end of the film is joined. The film feeding mechanism rotates the respective shafts of the plurality of film roll holding mechanisms to independently feed the films from the film rolls mounted on the shafts of the plurality of film roll holding mechanisms. The film feeding mechanism changes the feeding speed of the film during bag making and packaging operation in the bag making and packaging unit.

  In the bag making and packaging machine according to the first aspect of the present invention, the film roll is mounted on the shaft at the same position (first position), and is moved to another position by the moving mechanism. Therefore, the work load on the operator of the bag making and packaging machine can be suppressed.

  Further, here, since the feeding speed of the film roll during the bag making and packaging operation is variable, an efficient bag making and packaging machine can be realized.

  A bag making and packaging machine according to a second aspect of the present invention is the bag making and packaging machine according to the first aspect, wherein the frame shaft has a multi-layer shaft structure. The moving mechanism has a first motor and a first transmission mechanism. The first motor rotates the frame. The first transmission mechanism transmits the driving force of the first motor to the shaft of the first layer of the frame shaft. The film feeding mechanism has a second motor, a second transmission mechanism, and a third transmission mechanism. The second motor rotates the shaft of one film roll holding mechanism among the plurality of film roll holding mechanisms. The second transmission mechanism transmits the driving force of the second motor to the shaft of the second layer of the frame shaft. The third transmission mechanism transmits the driving force transmitted to the shaft of the second layer of the frame shaft to the shaft of the film roll holding mechanism to be driven by the second motor.

  In the bag making and packaging machine according to the second aspect of the present invention, a multilayer shaft structure is adopted for the frame shaft whose position does not change due to rotation of the frame, and the driving force of the motor is transmitted to the shaft via the frame shaft. I am configuring. Therefore, when moving the film roll holding mechanism, it is not necessary to move the second motor that drives the shaft. Therefore, the film roll can be mounted at the same position with a simple structure.

  A bag-making packaging machine according to a third aspect of the present invention is the bag-making packaging machine according to the first aspect or the second aspect, wherein the film supply unit is arranged in a transport path of the film fed from the film roll, It further has a movable roller for applying tension. The film feeding mechanism changes the film feeding speed on the basis of the position of the movable roller during the bag making and packaging operation in the bag making and packaging unit.

  In the bag making and packaging machine according to the third aspect of the present invention, since the film feeding speed is adjusted according to the position of the movable roller, high speed bag making can be realized.

  A bag-making packaging machine according to a fourth aspect of the present invention is the bag-making packaging machine according to any one of the first aspect to the third aspect, wherein the bag-making packaging unit has a film transport mechanism for transporting a film. The film feeding mechanism changes the feeding speed of the film based on the film feeding speed of the film feeding mechanism during the bag making and packaging operation in the bag making and packaging unit.

  In the bag making and packaging machine according to the fourth aspect of the present invention, high speed bag making is realized because the feeding speed of the film from the film roll is adjusted according to the film carrying speed of the film carrying mechanism on the bag making and packaging section side. It is possible.

  A bag making and packaging machine according to a fifth aspect of the present invention is the bag making and packaging machine according to any one of the first to fourth aspects, wherein the moving mechanism is a shaft of the first film roll holding mechanism by the joining mechanism. The first film roll holding mechanism is connected to the frame before the start end portion of the film roll of the film roll mounted on the frame is connected to the end portion of the film roll of the film roll mounted on the shaft of the second film roll holding mechanism. The shaft is moved around the shaft from the first position to a third position rotated by a predetermined angle. The film feeding mechanism, when the moving mechanism moves the first film roll holding mechanism from the first position to the third position, causes the shaft of the first film roll holding mechanism to move in the rotation direction of the first film roll holding mechanism. And in the same direction as above, by an angle corresponding to the above-mentioned predetermined angle.

  In the bag making and packaging machine according to the fifth aspect of the present invention, the first film roll holding mechanism holding the replacement film roll is rotated by a predetermined angle from the first position to the third position for joining the films. At that time, the shaft of the first film roll holding mechanism is rotated in the same direction as the rotation direction of the first film roll holding mechanism by the moving mechanism by an angle corresponding to the predetermined angle. Therefore, it is possible to eliminate the slack of the film caused by the rotation of the first film roll holding mechanism, and suppress the occurrence of the misalignment of the film and the trouble of the transport due to the slack of the film.

  In the bag making and packaging machine according to the present invention, since the film roll is mounted on the shaft at the same position (first position) and moved to another position by the moving mechanism, the work load on the operator of the bag making and packaging machine is suppressed. can do.

  Further, in the bag making and packaging machine according to the present invention, since the feeding speed of the film roll is variable, it is possible to realize efficient bag making.

1 is a schematic perspective view of a combination weighing / bag making and packaging system including a bag making and packaging machine according to an embodiment of the present invention. It is a schematic block diagram of the bag making packaging machine which the combination weighing / bag making packaging system of FIG. 1 has. It is a block diagram of the bag making packaging machine of FIG. It is a figure which shows an example of the film used with the bag making packaging machine of FIG. It is a schematic perspective view of the film supply part of the bag making packaging machine of FIG. FIG. 6 is an enlarged perspective view around a holding mechanism support frame of the film supply unit of FIG. 5. FIG. 7 is a cross-sectional perspective view showing the internal structure of a frame shaft that rotatably supports the holding mechanism support frame of FIG. 6. FIG. 6 is an enlarged side view of the main part of the film supply unit of FIG. 5 with the first film roll attached to the first holding mechanism. FIG. 6 is an enlarged side view of a main part of the film supply unit of FIG. 5 in a state where the first holding mechanism is moved to a film roll standby position. FIG. 6 is a schematic plan view around the frame shaft of the film supply unit of FIG. 5 for explaining the transmission of the driving force to the frame shaft, the first shaft, and the second shaft. 7 is a view for explaining a posture detection mechanism for detecting the posture of the holding mechanism support frame of FIG. 6.

  A bag making and packaging machine 1000 according to an embodiment of the bag making and packaging machine of the present invention will be described with reference to the drawings. The following embodiments are merely specific examples of the present invention, and do not limit the technical scope of the present invention. It will be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the invention as claimed.

  In the following description, expressions such as vertical, orthogonal, horizontal, and vertical may be used to describe directions, positional relationships, etc., but these are strictly vertical, orthogonal, horizontal, vertical, etc. Not only that, but also substantially vertical, orthogonal, horizontal, vertical, etc. are included.

  Further, in the following description, when expressions such as “front (front)”, “rear (rear)”, “top”, “bottom”, “left”, “right”, etc. are used to represent directions, etc. There is. Unless otherwise specified, “front (front)”, “rear (rear)”, “top”, “bottom”, “left”, and “right” here refer to the directions of the arrows attached to the drawings.

(1) Overall Configuration FIG. 1 is a schematic perspective view of a combination weighing / bag making and packaging system 1 including a bag making and packaging machine 1000 according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the bag making and packaging machine 1000. FIG. 3 is a block diagram of the bag making and packaging machine 1000. FIG. 4 is a diagram showing an example of the film F used in the bag making and packaging machine 1000.

  The combination weighing / bag making and packaging system 1 includes a combination weighing device 2000 and a bag making and packaging machine 1000 (see FIG. 1).

  The bag making and packaging machine 1000 is a device for making a bag-shaped packaging material from a sheet-shaped film F and making a bag B in which an article C is housed (see FIG. 2).

  The film F used here includes a printing surface Fa (see FIG. 4) arranged on the outer surface side when formed into the bag B, and a non-printing surface Fb on the back side of the printing surface Fa. A print P is applied to the print surface Fa. The non-printing surface Fb is not printed. The print P is a character, a figure, a photograph, or the like that is printed for advertising or sales promotion of the article C as a product, or for providing information about the article C. In addition to the print P, the registration mark M used for detecting the position of the film F is also printed on the print surface Fa.

  The article C is, for example, potato chips. However, the type of the article C is not limited to potato chips. The article C is supplied from the combination weighing device 2000 installed above the bag making and packaging machine 1000 (see FIG. 2).

  The bag making and packaging machine 1000 includes a bag making and packaging unit 200, a film supply unit 100, and a controller 300 (see FIGS. 2 and 3). The controller 300 controls the operation of various components of the bag making and packaging unit 200 and the film supply unit 100. The film supply unit 100 holds the film roll FR on which the sheet-shaped film F is wound, and supplies the film F fed from the film roll FR to the bag making and packaging unit 200. The bag making and packaging unit 200 forms a sheet-shaped film F into a tubular shape and seals the tubular film Ft to form a bag-like shape.

  The film supply unit 100 mainly has a first holding mechanism 110a and a second holding mechanism 110b, a film feeding mechanism 116, and a tension adjusting mechanism 180 as a mechanism for supplying the film F (see FIGS. 2 and 6). ). Each of the holding mechanisms 110a and 110b holds the film roll FR around which the sheet-shaped film F is wound (see FIG. 2). Specifically, the first holding mechanism 110a has a shaft 111a to which the film roll FR is mounted and which rotatably holds the mounted film roll FR (see FIG. 6). The second holding mechanism 110b has a shaft 111b to which the film roll FR is mounted and which rotatably holds the mounted film roll FR (see FIG. 6).

  The film roll FR is a sheet-shaped film F as shown in FIG. 4 wound around a winding core (not shown). The end of the film F wound around the film roll FR on the winding core side is connected (fixed) to the winding core by, for example, being attached to the winding core with a tape (not shown) or being adhered to the winding core with an adhesive or the like. ) Has been.

  The film feeding mechanism 116 is mounted on the shaft of the holding mechanism by rotating the respective shafts (first shaft 111a and second shaft 111b) of the plurality of holding mechanisms (first holding mechanism 110a and second holding mechanism 110b). The film F is a mechanism for feeding the film F independently from each other. The film feeding mechanism 116 has a first holding mechanism motor 114a and a second holding mechanism motor 114b. The first holding mechanism motor 114a is a mechanism that rotates the shaft 111a to feed the film from the film roll FR mounted on the shaft 111a. The second holding mechanism motor 114b is a mechanism that rotates the shaft 111b to feed the film from the film roll FR mounted on the shaft 111b. That is, in the bag making and packaging machine 1000, the film roll FR mounted on the shafts 111a and 111b of the plurality of holding mechanisms 110a and 110b is fed to the single film feeding mechanism (for example, in the transport direction of the film F, the film roll FR is used). The film F is not drawn out by using the pinch rollers arranged on the downstream side of the film F, but the film F is drawn out by the holding mechanism motors 114a and 114b which are independent of each other.

  The bag making and packaging unit 200 mainly has a former unit 210 having a former body 212 and a tube 214, a film transport belt 220, a vertical sealing mechanism 230, and a horizontal sealing mechanism 240 (see FIG. 2).

  The bag making and packaging machine 1000 controls the operation of various components of the bag making and packaging unit 200 and the film supply unit 100 by the controller 300, so that the bag B in which the articles C are accommodated is stored in the following manner. It is manufactured (see FIG. 3).

  The sheet-shaped film F is supplied to the bag making and packaging unit 200 from the film roll FR held by one of the two holding mechanisms 110a and 110b of the film supply unit 100. When the sheet-shaped film F is supplied from the film roll FR mounted on the first shaft 111a of the first holding mechanism 110a, the film F is delivered by the first holding mechanism motor 114a. When the sheet-shaped film F is supplied from the film roll FR mounted on the second shaft 111b of the holding mechanism 110b, the film F is delivered by the second holding mechanism motor 114b. The sheet-shaped film F pulled out from the film roll FR is transported by the film transport belt 220 of the bag making and packaging unit 200. The sheet-shaped film F conveyed to the bag-making packaging unit 200 is guided by a plurality of rollers 170 including a movable roller 185 and a fixed roller 182 of a tension adjusting mechanism 180, which will be described later, and is directed to the former body 212 of the former unit 210. Be transported. In the tension adjusting mechanism 180, a force is applied to the film F by the movable roller 185 to adjust the tension of the conveyed film F. In the former main body 212, the sheet-shaped film F is formed into a tubular shape to form a tubular film Ft. The tubular film Ft is transported downward by the film transport belt 220, and the overlapping portion of the tubular film Ft is vertically sealed by the vertical sealing mechanism 230 arranged below the former body 212. The tubular film Ft sealed in the vertical direction (the film transport direction) by the vertical seal mechanism 230 is further transported downward by the film transport belt 220, and the tubular film Ft is disposed by the horizontal seal mechanism 240 disposed below the vertical seal mechanism 230. The film Ft is sealed in a direction intersecting the transport direction (particularly, here, a direction orthogonal to the transport direction). Further, in the lateral sealing mechanism 240, the lateral sealing portion of the tubular film Ft is laterally cut at the central portion of the tubular film Ft in the transport direction, and the sealed upper and lower bags B are manufactured. The article C is supplied into the tubular film Ft serving as the bag B through the tube 214 of the former unit 210 before the tubular film Ft is sealed by the horizontal sealing mechanism 240. As a result, in the bag making and packaging machine 1000, the bag B containing the article C is made. The bag B containing the articles C made by the bag making and packaging machine 1000 is conveyed to the downstream process by, for example, a conveyor (not shown) arranged below the horizontal sealing mechanism 240.

(2) Detailed Configuration The bag making and packaging unit 200, the film supply unit 100, and the controller 300 of the bag making and packaging machine 1000 will be described in detail.

(2-1) Bag Making and Packaging Section The former unit 210, the film transport belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240 of the bag making and packaging section 200 will be described.

(2-1-1) Former Unit The former unit 210 mainly has a former main body 212 and a tube 214 (see FIG. 2).

  The former body 212 is arranged so as to surround the cylindrical tube 214 in the circumferential direction. The former main body 212 bends the sheet-shaped film F drawn from the film roll FR and conveyed to the former main body 212 so that the left end portion and the right end portion of the film F overlap with each other to form a tubular shape. The tubular film Ft formed by the former main body 212 is guided so as to be wound around the outer peripheral surface of the lower side of the cylindrical tube 214, and is conveyed downward while being wound around the tube 214.

  The tube 214 is a cylindrical member that extends in the vertical direction and has upper and lower ends opened. The upper part of the tube 214 is formed in a funnel shape whose diameter increases toward the upper end side (see FIG. 2). The lower portion of the tube 214 has a uniform diameter (see FIG. 2). The tube 214 receives the falling article C from the opening at the top (see FIG. 2). The article C input from the opening in the upper part of the tube 214 passes through the inside of the tube 214 and is supplied into the tubular film Ft from the opening in the lower part of the tube 214.

(2-1-2) Film Conveying Belt The bag making and packaging unit 200 has a pair of film conveying belts 220. The pair of film transport belts 220 are arranged below the former unit 210 (see FIG. 2). The pair of film transport belts 220 are respectively arranged on the left side and the right side of the tube 214 of the former unit 210 around which the tubular film Ft is wound. In FIG. 2, only the film transport belt 220 on the right side is drawn.

  The pair of film transport belts 220 transport the film F drawn from the film roll FR to the former main body 212. Further, the film transport belt 220 transports the tubular film Ft formed by the former main body 212 to the horizontal sealing mechanism 240. Specifically, the film transport belt 220 adsorbs the tubular film Ft wound around the tube 214 and transports it downward.

  Each film transport belt 220 has a drive roller 222, a driven roller 224, and a belt 226 (see FIG. 3). The belt 226 has a suction function. The belt 226 is wound around the driving roller 222 and the driven roller 224. The drive roller 222 is connected to a roller drive motor (not shown) and is driven by the roller drive motor. When the drive roller 222 is driven by the roller drive motor with the belt 226 adsorbing the film, the tubular film Ft is conveyed downward.

(2-1-3) Vertical Seal Mechanism The vertical seal mechanism 230 (see FIG. 2) is a mechanism that vertically seals (overlaps vertically) the overlapping portion of the tubular film Ft wound around the tube 214.

  The vertical seal mechanism 230 has a heater (not shown), a heater belt (not shown) that contacts the overlapping portion of the tubular film Ft, and a drive mechanism (not shown) that drives the heater belt. The heater heats the heater belt. The drive mechanism drives the heater belt in the front-rear direction so as to approach the tube 214 or move away from the tube 214. The heat belt is driven by the drive mechanism so as to approach the tube 214, so that the overlapping portion of the tubular film Ft wound around the tube 214 is sandwiched between the heater belt and the tube 214. The vertical sealing mechanism 230 presses the heated heater belt against the tube 214 with a predetermined pressure against the overlapping portion of the tubular film Ft to heat-seal the overlapping portion of the tubular film Ft in the vertical direction.

(2-1-4) Horizontal Seal Mechanism The horizontal seal mechanism 240 is arranged below the film transport belt 220 and the vertical seal mechanism 230 (see FIG. 2). The horizontal sealing mechanism 240 is a mechanism that laterally seals the tubular film Ft that has been vertically sealed by the vertical sealing mechanism 230 and is transported downward by the film transport belt 220. In other words, the horizontal sealing mechanism 240 is a mechanism that seals the tubular film Ft in a direction intersecting with the transport direction of the tubular film Ft (more specifically, a direction orthogonal thereto).

  The horizontal sealing mechanism 240 has a pair of rotating bodies 242 respectively arranged before and after the tubular film Ft (see FIG. 2). A seal jaw 244a and a seal jaw 244b having a built-in heater are attached to each of the rotating bodies 242 (see FIG. 2). The sealing jaws 244a of both the rotating bodies 242 function as a pair when laterally sealing the tubular film Ft. Further, the sealing jaws 244b of both the rotating bodies 242 function as a pair when laterally sealing the tubular film Ft. The pair of sealing jaws 244a and the pair of sealing jaws 244b alternately laterally seal the conveyed tubular film Ft.

  Horizontal sealing of the tubular film Ft and cutting of the tubular film Ft by the sealing jaws 244a will be described.

  When a drive mechanism (not shown) is driven to rotate the pair of rotating bodies 242, the sealing jaws 244a attached to the rotating bodies 242 rotate while drawing loci symmetrical to each other in a side view (illustrated by dotted lines in FIG. 2). See the trace). The pair of swiveling sealing jaws 244a sandwich the tubular film Ft in a state of pressing each other, and apply pressure and heat to a part of the tubular film Ft that is the upper and lower ends of the bag B to laterally seal. A cutter (not shown) is built in one of the seal jaws 244a. The cutter cuts the lateral seal portion of the tubular film Ft at the center position in the transport direction of the tubular film Ft, and separates the bag B and the subsequent tubular film Ft.

  The lateral sealing of the tubular film Ft and the cutting of the tubular film Ft by the sealing jaws 244b are the same as those of the sealing jaws 244a, and thus the description thereof is omitted.

(2-2) Film Supply Unit The film supply unit 100 will be described with reference to further drawings.

  FIG. 5 is a schematic perspective view of the film supply unit 100. FIG. 6 is an enlarged perspective view around the holding mechanism support frame 120 of the film supply unit 100. FIG. 7 is a cross-sectional perspective view showing the internal structure of the frame shaft 130 that rotatably supports the holding mechanism support frame 120. FIG. 8 is an enlarged side view of the main part of the film supply unit 100 with the film roll FR attached to the first holding mechanism 110a and the second holding mechanism 110b. FIG. 9 is an enlarged side view of the main part of the film supply unit 100 in a state where the first holding mechanism 110a is moved to the film roll standby position A3. FIG. 10 is a schematic plan view around the frame shaft 130 of the film supply unit 100 for explaining the transmission of the driving force to the frame shaft 130, the first shaft 111a, and the second shaft 111b.

  The film supply unit 100 is a unit that supplies the film F wound around the film roll FR to the bag making and packaging unit 200. In the film supply unit 100, the film F is guided to the bag making and packaging unit 200 by the plurality of rollers 170 arranged along the transport path of the film F. The rollers 170 include a fixed roller 182 and a movable roller 185 of the tension adjusting mechanism 180.

  The film supply unit 100 has a tension adjusting mechanism 180 that adjusts the tension acting on the conveyed film F. The film supply unit 100 also includes a first holding mechanism 110a and a second holding mechanism 110b, a holding mechanism support frame 120, a frame shaft 130, a moving mechanism 139, and a film feeding mechanism 116. Further, the film supply unit 100 has a starting position adjusting mechanism 140. The film supply unit 100 also has a terminal position adjustment / film joining mechanism 160.

  Further, the starting end portion position adjusting mechanism 140 mainly includes a starting end portion position adjusting sensor 142, a film temporary placement portion 143, a temporary pressing mechanism 144, and an end position adjusting air nozzle 146. The starting end portion position adjusting mechanism 140, when a new film roll FR for replacement is attached to the first holding mechanism 110a or the second holding mechanism 110b, the starting end portion of the film F wound around the film roll FR or the film F. It is mainly used to adjust the position of the vicinity of the end of the.

  In addition, here, the start end portion, the end portion, and the end of the film F are defined as follows.

  First, in the definition, the film F of the film roll FR (hereinafter referred to as a used film roll FR for convenience of description) held by one of the first holding mechanism 110a and the second holding mechanism 110b is used up, and the first holding mechanism is used. The film F of the film roll FR (hereinafter, referred to as a replacement film roll FR for convenience of description) held by the other of the 110a and the second holding mechanism 110b is joined to the film F of the used film roll FR by a joining mechanism 162 described later. Suppose that it is done.

  At this time, the portion of the film F of the replacement film roll FR that is joined to the film F of the used film roll FR is called the starting end portion of the film F. Further, the portion of the film F of the used film roll FR that is joined to the starting end portion of the film F of the replacement film roll FR is referred to as the terminal end portion of the film F. The end of the film F here means the end of the film F wound on the replacement film roll FR on the pull-out side (the side opposite to the side connected to the winding core (not shown)). For example, in the case of FIGS. 8 and 9, the portion indicated by reference numeral F1L is the starting end portion of the film F (of the replacement film roll FR), and the portion indicated by reference numeral F2T is (used film roll FR). The end portion of the film F means the end portion of the film F (of the replacement film roll FR) indicated by the symbol F1E.

  As will be described later, the position adjustment between the starting end of the film F of the replacement film roll FR and the ending end of the film F of the used film roll FR is performed by adjusting the film F of the replacement film roll FR and the used film. This is performed in order to prevent the print P of the film F from being displaced when the film F of the roll FR is bonded by the bonding mechanism 162.

  In the following description, in addition to the above expression, the expression of detecting the end of the film roll FR may be used. Detecting the end of the film roll FR means detecting a state in which the film F wound around the film roll FR is completely withdrawn from the film roll FR.

  The end position adjusting / film joining mechanism 160 includes a joining mechanism 162, a first clamp 163, a second clamp 164, a knife 166, a pinch roller 168, a first end position adjusting sensor 152, and a second end position adjusting second sensor 154. , And a cooling air solenoid valve 161a. The terminal position adjusting / film joining mechanism 160 detects when the film F of the film roll FR (hereinafter, referred to as a used film roll FR for convenience of description) held by one of the holding mechanisms 110a and 110b is used up. Then, the position of the end portion of the film F of the used film roll FR is adjusted to an appropriate position, and the film roll FR held by the other of the holding mechanisms 110b and 110a (hereinafter, referred to as a replacement film roll FR for convenience of description). ) Is mainly used for joining with the film F.

  The devices, mechanisms and members of the film supply unit 100 will be described below.

  The film rolls FR held by the holding mechanisms 110a and 110b are the same type of film rolls around which the same type of sheet-shaped film F is wound. However, hereinafter, for convenience of description, the film roll held by the first holding mechanism 110a may be referred to as a first film roll FR1 around which the sheet-shaped first film F1 is wound. The film roll held by the second holding mechanism 110b may be referred to as a second film roll FR2 around which the second film F2 is wound.

(2-2-1) Holding Mechanism In the first holding mechanism 110a and the second holding mechanism 110b, the sheet-shaped film F (first film F1 and second film F2) is wound around a hollow winding core (not shown). This is a mechanism for holding the rotated film roll FR (first film roll FR1 and second film roll FR2) (see FIG. 6).

  The first holding mechanism 110a is equipped with the first film roll FR1 and has a first shaft 111a that rotatably holds the mounted first film roll FR1 (see FIG. 6). The first shaft 111a is a cantilevered shaft whose one end is supported by the holding mechanism support frame 120 side. When the connecting mechanism 111a1 (for example, an air chuck) is driven in a state where the first shaft 111a is inserted through the hollow core of the first film roll FR1, the first film roll FR1 is fixed to the first shaft 111a. (See FIG. 6). In this state, when the first shaft 111a is rotated by the first holding mechanism motor 114a, the first film roll FR1 rotates together with the first shaft 111a.

  Preferably, the first holding mechanism 110a adjusts the position of the starting end portion F1L of the first film F1 wound around the first film roll FR1 after the first film roll FR1 is mounted on the first shaft 111a. In addition, it is preferable to have a first guide member 119 that guides the first film F1 so that the first film F1 is arranged along a predetermined path (see FIG. 8). Further, in the first holding mechanism 110a, the first film roll FR1 is attached to the first shaft 111a, and the starting end portion F1L of the first film F1 wound around the first film roll FR1 in the manner described below is in the regular position. The first film F1 is pressed until the start end portion F1L of the first film F1 and the end end portion F2T of the second film F2 are joined when aligned to (the position where the start end portion F1L should be arranged). It is preferable to have a film pressing mechanism 117 (see FIG. 8). The first film pressing mechanism 117 includes a fixed roller 112 and an air cylinder 118a having a movable roller 118 attached to the tip of a rod (see FIG. 8). When the air cylinder 118a is driven and the movable roller 118 is pressed against the fixed roller 112, the first film F1 disposed between the movable roller 118 and the fixed roller 112 is moved to the movable roller 118 and the fixed roller 112 (particularly, the first film F1). Of the three rollers arranged side by side, the roller is pressed between the fixed roller 112a) arranged in the center in the state drawn in FIG. Although the air cylinder 118a is raised as an example of the mechanism for moving the movable roller 118 here, the mechanism for moving the movable roller 118 may be a hydraulic cylinder or a motor. The first guide member 119, the fixed roller 112, and the air cylinder 118a are attached to an arm 122a extending from the holding mechanism support frame 120 (see FIG. 8).

  The second holding mechanism 110b has a second shaft 111b to which the second film roll FR2 is mounted and which rotatably holds the mounted second film roll FR2 (see FIG. 6). The second shaft 111b is a cantilevered shaft whose one end is supported by the holding mechanism support frame 120 side. When the connecting mechanism 111b1 (for example, an air chuck) is driven in a state where the second shaft 111b is inserted through the hollow core of the second film roll FR2, the second film roll FR2 is fixed to the second shaft 111b. (See FIG. 6). In this state, when the second shaft 111b is rotated by the second holding mechanism motor 114b, the second film roll FR2 is rotated together with the second shaft 111b.

  Although detailed description is omitted for simplification of description, the second holding mechanism 110b also includes a second guide member and a second guide member having the same structure and function as the first guide member 119 and the first film pressing mechanism 117. It is preferable to have a two-film pressing mechanism (not shown).

  When the film F is unwound from the film roll FR held by the first holding mechanism 110a or the second holding mechanism 110b, the unwound film F is transported by the film transport belt 220. The film F drawn from the film roll FR is guided by a plurality of rollers 170 including the movable roller 185 and the fixed roller 182 of the tension adjusting mechanism 180, and is conveyed to the former body 212 of the former unit 210 of the bag making and packaging unit 200. (See FIG. 2).

(2-2-2) Tension adjusting mechanism The tension adjusting mechanism 180 is a mechanism for adjusting the magnitude of the tension acting on the film F being conveyed. The tension adjusting mechanism 180 mainly includes three fixed rollers 182, a movable roller mechanism 184, a shaft 184a, a movable roller mechanism air cylinder 187, and an encoder 188 (see FIGS. 3 and 8). The movable roller mechanism 184 has two movable rollers 185 and a pair of arms 186 (see FIG. 7). The arm 186 is a member that supports the two movable rollers 185. The pair of arms 186 are arranged on the left side and the right side of the movable roller 185 so as to sandwich the movable roller 185 extending in the left-right direction, and support the ends of the movable roller 185. The arm 186 is rotatably supported by a shaft 184a extending in the left-right direction. The movable cylinder mechanism air cylinder 187 has a tip of a lot (not shown) connected to an arm (not shown) extending in a radial direction from the shaft 184a. By driving the movable roller mechanism air cylinder 187, a force for rotating the shaft 184a is generated.

  The fixed roller 182 and the movable roller 185 are arranged in the transport path of the film F fed from the film roll FR. The fixed roller 182 and the movable roller 185 are arranged between the film roll FR and the former main body 212 in the transport direction of the film F (see FIG. 2). The fixed roller 182 and the movable roller 185 are both rotatable rollers. Both the fixed roller 182 and the movable roller 185 extend in the left-right direction. The fixed roller 182 is fixed to a frame (not shown) of the bag making and packaging machine 1000, and its position does not change. On the other hand, since the movable roller 185 is fixed to the arm 186 rotatable around the shaft center of the shaft 184a as described above, the position of the movable roller 185 is changed (that is, movable) by the movement of the arm 186.

  The fixed roller 182 and the movable roller 185 contact the film F conveyed from the film roll FR and guide the film F. When the film F is conveyed from the film roll FR, the fixed roller 182, the movable roller 185, the fixed roller 182, the movable roller 185, and the fixed roller 182 are brought into contact with the film F in this order from the upstream side so that the fixed roller 182 and the movable roller 182 are in contact with each other. It is wrapped around 185 (see FIG. 8). The film F contacts the lower surface (printing surface Fa) of the film F on which the fixed roller 182 is conveyed, and the movable roller 185 contacts the upper surface (non-printing surface Fb) of the film F on which the movable roller 185 is conveyed. And is wound around the movable roller 185 (see FIG. 8).

  The movable roller 185 contacting the upper surface of the conveyed film F moves the film F downward due to the combined force of the own weight of the movable roller mechanism 184 and the force generated by the movable roller mechanism air cylinder 187 to rotate the shaft 184a. Push. As a result, the movable roller 185 applies tension to the film F. By controlling the operation of the movable roller mechanism air cylinder 187, the force of the movable roller 185 pushing the film F downward changes, and the tension acting on the film F changes.

  An encoder 188 (see FIG. 3) for detecting the rotation angle of the shaft 184a is attached to one end of the shaft 184a. The detection result of the encoder 188 is used for controlling the position of the movable roller 185 by the controller 300 described later. The detection result of the encoder 188 can also be used for detecting the end of the film roll FR by the controller 300 described later.

  When the film F is conveyed during the operation of the bag making and packaging machine 1000, the controller 300, based on the detection result of the encoder 188, holds the film roll FR from which the film F is fed out, as will be described later. The rotation speeds of the shafts 111a and 111b of 110b (in other words, the feeding speed of the film F) are adjusted, and the position of the movable roller 185 that guides the film F is controlled to a predetermined position. For example, if the film roll FR on which the film F is fed is the second film roll FR2, the controller 300 adjusts the rotation speed of the shaft 111b of the second holding mechanism 110b that holds the second film roll FR2, The position of the movable roller 185 that guides the 2nd film F2 is controlled to a predetermined position (predetermined position area).

(2-2-3) Holding Mechanism Support Frame The holding mechanism support frame 120 is an example of a frame that supports a plurality of film roll holding mechanisms. In the present embodiment, the holding mechanism support frame 120 supports the first holding mechanism 110a and the second holding mechanism 110b. In particular, the holding mechanism support frame 120 rotatably supports the first shaft 111a of the first holding mechanism 110a and rotatably supports the second shaft 111b of the second holding mechanism 110b.

  Further, an arm 122a and an arm 122b extend from the holding mechanism support frame 120. The first guide member 119 held by the first holding mechanism 110a, the fixed roller 112 of the first film pressing mechanism 117, and the air cylinder 118a are attached to the arm 122a. A second guide member, a fixed roller of a second film pressing mechanism, and an air cylinder are attached to the arm 122b (not shown). The second guide member and the second film pressing mechanism of the second holding mechanism 110b are the same as the first guide member 119 and the first film pressing mechanism 117 of the first holding mechanism 110a, except that they are for the second holding mechanism 110b. It has the structure and function of.

(2-2-4) Frame Shaft The frame shaft 130 is a shaft that rotatably supports the holding mechanism support frame 120.

  By rotating the holding mechanism support frame 120 around the central axis of the frame shaft 130, the first shaft 111a of the first holding mechanism 110a and the second shaft 111b of the second holding mechanism 110b also rotate around the central axis of the frame shaft 130. To rotate. Further, as the holding mechanism support frame 120 rotates about the central axis of the frame shaft 130, the arms 122a and 122b of the holding mechanism support frame 120 also rotate about the central axis of the frame shaft 130. Even if the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the relative positional relationship between the first shaft 111a of the first holding mechanism 110a and the arm 122a of the holding mechanism support frame 120 changes. do not do. Further, even if the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the relative positional relationship between the second shaft 111b of the second holding mechanism 110b and the arm 122b of the holding mechanism support frame 120 changes. do not do.

  The frame shaft 130 has a multilayer shaft structure. Here, the frame shaft 130 has a three-layer shaft structure. The frame shaft 130 includes the largest diameter first layer shaft 132 arranged in the outermost layer, the smallest diameter third layer shaft 136 arranged in the innermost layer, the first layer shaft 132 and the third layer shaft 136. And a second layer shaft 134 disposed between and (see FIG. 7). The first layer shaft 132, the second layer shaft 134, and the third layer shaft 136 can rotate independently of each other.

  The first layer shaft 132 is a shaft for rotating the holding mechanism support frame 120. One end of the first layer shaft 132 is fixed to the holding mechanism support frame 120. As the first layer shaft 132 is rotated by the moving mechanism 139 as described below, the holding mechanism support frame 120 rotates.

  The second layer shaft 134 is a shaft for rotating the first shaft 111a of the first holding mechanism 110a. As the second layer shaft 134 is rotated by the film feeding mechanism 116 as described later, the first shaft 111a of the first holding mechanism 110a rotates. Specifically, the second layer shaft 134 is rotated by the first holding mechanism motor 114a of the film feeding mechanism 116, so that the first shaft 111a of the first holding mechanism 110a is rotated and the first shaft 111a is rotated. The first film F1 is fed from the mounted first film roll FR1.

  The third layer shaft 136 is a shaft for rotating the second shaft 111b of the second holding mechanism 110b. As the third layer shaft 136 is rotated by the film feeding mechanism 116 as described below, the second shaft 111b of the second holding mechanism 110b rotates. Specifically, the third layer shaft 136 is rotated by the second holding mechanism motor 114b of the film feeding mechanism 116, whereby the second shaft 111b of the second holding mechanism 110b is rotated and the second shaft 111b is rotated. The second film F2 is fed from the mounted second film roll FR2.

(2-2-5) Moving Mechanism The moving mechanism 139 rotates the holding mechanism support frame 120 to move the first holding mechanism 110a and the second holding mechanism 110b to at least the film roll set position A1 and the film supply position A2. Move between. Further, preferably, the moving mechanism 139 rotates the holding mechanism support frame 120 to move one of the first holding mechanism 110a and the second holding mechanism 110b to the film roll standby position A3, and the first holding mechanism 110a. And the other of the second holding mechanism 110b is also moved to the film supply position A4. The film roll setting position A1 of the first holding mechanism 110a and the second holding mechanism 110b is the position where the first holding mechanism 110a is arranged in FIG. The film supply position A2 of the first holding mechanism 110a and the second holding mechanism 110b is the position where the second holding mechanism 110b is arranged in FIG. The film roll standby position A3 of the first holding mechanism 110a and the second holding mechanism 110b is the position where the first holding mechanism 110a is arranged in FIGS. 2 and 9. The film supply position A4 of the first holding mechanism 110a and the second holding mechanism 110b is the position where the second holding mechanism 110b is arranged in FIG. The film roll standby position A3 is a position rotated about the central axis of the frame shaft 130 by a predetermined angle (for example, 45 °) counterclockwise from the film roll set position A1 around the frame shaft 130 in the right side view. is there. In addition, although not limited, the film supply position A2 is a predetermined angle counterclockwise around the central axis of the frame shaft 130 from the film roll standby position A3 around the frame shaft 130 in the right side view ( For example, it is a position rotated by 135 °. Further, the film supply position A4 is a position rotated about the central axis of the frame shaft 130 by a predetermined angle (for example, 45 °) counterclockwise from the film supply position A2 around the frame shaft 130 in the right side view. is there.

  The film roll set position A1 is a position where the film roll FR is mounted on the first shaft 111a of the first holding mechanism 110a and the second shaft 111b of the second holding mechanism 110b. That is, in the bag making and packaging machine 1000, the film roll FR is mounted on the shafts 111a and 111b at the same position with respect to the first holding mechanism 110a and the second holding mechanism 110b.

  The film supply positions A2 and A4 are positions where the film F supplied to the bag making and packaging unit 200 is fed from the film roll FR mounted on the shafts 111a and 111b during the bag making and packaging operation of the bag making and packaging machine 1000. . That is, one of the holding mechanisms 110a and 110b that holds the film roll FR that supplies the film F to the bag making and packaging unit 200 has the film supply position A2 and the film feeding position A2 when the bag making and packaging operation is performed in the bag making and packaging unit 200. It is mainly arranged at one of the film supply positions A4.

  In the film roll standby position A3, the first holding mechanism 110a in which the first film roll FR1 is mounted on the first shaft 111a at the film roll setting position A1 is the second film roll FR2 held by the second holding mechanism 110b. This is a position to wait until the second film F2 is used up. The film roll standby position A3 is the first film roll held by the first holding mechanism 110a by the second holding mechanism 110b in which the second film roll FR2 is mounted on the second shaft 111b at the film roll setting position A1. This is a position to wait until the first film F1 of FR1 is used up.

  Further, at the film roll standby position A3, the starting end portion F1L of the first film F1 of the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a is moved to the second holding mechanism by the joining mechanism 162 described later. This is the position where the first holding mechanism 110a is arranged when it is joined to the terminal end F2T of the second film roll FR2 mounted on the second shaft 111b of 110b. That is, when the first holding mechanism 110a is moved to the film roll standby position A3, the starting end portion F1L of the first film F1 is joined to the end portion F2T of the second film F2 by the joining mechanism 162 (the joining position). Called)). Similarly, at the film roll standby position A3, the starting end portion (not shown) of the second film F2 of the second film roll FR2 mounted on the second shaft 111b of the second holding mechanism 110b is moved by the joining mechanism 162 described later. This is the position where the second holding mechanism 110b is arranged when it is joined to the end portion (not shown) of the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a. When the second holding mechanism 110b is moved to the film roll standby position A3, the start end of the second film F2 moves to a position (bonding position) where the bonding mechanism 162 bonds the end of the first film F1. To be made.

  The structure of the moving mechanism 139 will be described.

  The moving mechanism 139 mainly includes a frame rotation motor 138 and a frame rotation transmission mechanism 137. The frame rotation motor 138 is a motor for rotating the holding mechanism support frame 120. The frame rotation transmission mechanism 137 is a mechanism that transmits the driving force of the frame rotation motor 138 to the first layer shaft 132 of the frame shaft 130.

  The frame rotation transmission mechanism 137 includes a belt 137a, a drive roller 137b, and a driven roller 137c. The belt 137a is wound around the driving roller 137b and the driven roller 137c. The drive roller 137b is connected to the frame rotation motor 138 and is driven by the frame rotation motor 138. The driven roller 137c is connected to one end of the first layer shaft 132 of the frame shaft 130 (the end of the first layer shaft 132 that is not connected to the holding mechanism support frame 120). When the frame rotation motor 138 is driven, the drive roller 137b rotates, the driven roller 137c rotates via the belt 137a, and the first layer shaft 132 also rotates. Then, as a result of the rotation of the first layer shaft 132, the holding mechanism support frame 120 is rotated, and the first holding mechanism 110a and the second holding mechanism 110b are moved.

  The detection of the posture of the holding mechanism support frame 120 rotated by the moving mechanism 139 can be realized at low cost by the mechanism 400 described below, for example.

  A mechanism 400 for detecting the posture of the holding mechanism support frame 120 is fixed to an end portion of the first layer shaft 132 (rotates together with the first layer shaft 132), as shown in FIG. 11, and is a first member 402. , A second member 404 and a third member 406, and two photoelectric sensors 408A and 408B. The first member 402 is formed in a fan shape having a radius R1 around the rotation axis O of the first layer shaft 132 when the end of the first layer shaft 132 to which the first member 402 is attached is viewed from the side. It is a plate. The second member 404 has a radius R2 (> R1) whose outer peripheral side is centered on the rotation axis O of the first layer shaft 132 when the end of the first layer shaft 132 to which the second member 404 is attached is viewed from the side. ), The inner peripheral side is surrounded by an arc having a radius R1 centered on the rotation axis O of the first layer shaft 132, and these arcs are two straight lines extending in the longitudinal direction with respect to the rotation axis O. FIG. 12 is a connected plate having a shape as shown in FIG. 11. The third member 406 is formed in a fan shape having a radius R2 around the rotation axis O of the first layer shaft 132 when the end of the first layer shaft 132 to which the third member 406 is attached is viewed from the side. It is a plate. The photoelectric sensor 408A includes the first member 402 and the first member 402 at a position separated from the rotation axis O by a distance K1 (K1 <R1) when the end of the first layer shaft 132 to which the first member 402 is attached is viewed from the side. The presence or absence of the third member 406 is detected. The photoelectric sensor 408B is arranged on a straight line connecting the rotation axis O and the photoelectric sensor 408A when the end portion of the first layer shaft 132 to which the first member 402 is attached is viewed from the side, and Presence or absence of the second member 404 and the third member 406 is detected at a position separated by a distance K2 (R1 <K2 <R2). The positions of the two photoelectric sensors 408A and 408B are constant regardless of the rotation of the first layer shaft 132.

  The first member 402, the second member 404, and the third member 406 detect the members 402, 404, and 406 by using the two photoelectric sensors 408A and 408B as shown in FIG. Depending on the rotation angle, only one of the two photoelectric sensors 408A, 408B is detecting a member, both photoelectric sensors 408A, 408B are detecting a member, and two photoelectric sensors 408A, 408B are Both are not detecting the member, and are arranged so as to occur. Then, by utilizing the combination of the detection results of the two photoelectric sensors 408A and 408B, it is possible to detect the rough rotation angle of the first layer shaft 132, and thus the posture of the holding mechanism support frame 120.

  Note that, here, the case where three members 402, 404, and 406 are attached to the end portion of the first layer shaft 132 and two photoelectric sensors 408A and 408B are used has been described as an example, but using the above detection principle, By increasing the numbers of members and photoelectric sensors, it is possible to detect the posture of the holding mechanism support frame 120 with higher accuracy.

(2-2-6) Film feeding mechanism The film feeding mechanism 116 rotates the shafts (first shaft 111a and second shaft 111b) of the plurality of holding mechanisms (first holding mechanism 110a and second holding mechanism 110b). Then, the films (first film F1 and second film F2) are independently fed from the film rolls (first film roll FR1 and second film roll FR2) mounted on the shafts of the plurality of holding mechanisms. The film feeding mechanism 116 is configured to be able to change the feeding speed of the first film roll FR1 and the second film roll FR2 during the bag making and packaging operation in the bag making and packaging unit 200.

  The film feeding mechanism 116 includes a first holding mechanism motor 114a, a second holding mechanism motor 114b, a first transmission mechanism 115a, a second transmission mechanism 115b, a third transmission mechanism 115c, and a fourth transmission mechanism 115d. And, including.

  The first holding mechanism motor 114a rotates the first shaft 111a of the first holding mechanism 110a among the plurality of holding mechanisms 110a and 110b. The first holding mechanism motor 114a is preferably a servo motor. The first transmission mechanism 115a transmits the driving force of the first holding mechanism motor 114a to the second layer shaft 134 of the frame shaft 130. The second transmission mechanism 115b transmits the driving force transmitted to the second layer shaft 134 of the frame shaft 130 to the first shaft 111a of the first holding mechanism 110a to be driven by the first holding mechanism motor 114a.

  The first transmission mechanism 115a includes a belt 115a1, a driving roller 115a2, and a driven roller 115a3. The belt 115a1 is wound around the driving roller 115a2 and the driven roller 115a3. The drive roller 115a2 is connected to the first holding mechanism motor 114a and is driven by the first holding mechanism motor 114a. The driven roller 115a3 is connected to one end of the second layer shaft 134 of the frame shaft 130. When the first holding mechanism motor 114a is driven, the drive roller 115a2 rotates, the driven roller 115a3 rotates via the belt 115a1, and the second layer shaft 134 also rotates.

  The second transmission mechanism 115b includes a belt 115b1, a driving roller 115b2, and a driven roller 115b3. The belt 115b1 is wound around the driving roller 115b2 and the driven roller 115b3. The drive roller 115b2 is connected to one end (an end different from the side to which the driven roller 115a3 is connected) of the second layer shaft 134 of the frame shaft 130, and when the second layer shaft 134 rotates, the drive roller 115b2 is also connected. Rotate. The driven roller 115b3 is connected to one end of the first shaft 111a of the first holding mechanism 110a (the end portion on the side supported by the holding mechanism support frame 120). When the second layer shaft 134 rotates, the drive roller 115b2 rotates, the driven roller 115b3 rotates via the belt 115b1, and the first shaft 111a of the first holding mechanism 110a also rotates.

  With the above configuration, when the first holding mechanism motor 114a is driven, the driving force of the first holding mechanism motor 114a is changed to the first via the first transmission mechanism 115a and the second transmission mechanism 115b. It is transmitted to the first shaft 111a of the first holding mechanism 110a, and the first shaft 111a is rotated. As a result, the first film F1 is fed from the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a.

  The second holding mechanism motor 114b rotates the second shaft 111b of the second holding mechanism 110b among the plurality of holding mechanisms 110a and 110b. The second holding mechanism motor 114b is preferably a servo motor. The third transmission mechanism 115c transmits the driving force of the second holding mechanism motor 114b to the third layer shaft 136 of the frame shaft 130. The fourth transmission mechanism 115d transmits the driving force transmitted to the third layer shaft 136 of the frame shaft 130 to the second shaft 111b of the second holding mechanism 110b to be driven by the second holding mechanism motor 114b.

  The third transmission mechanism 115c includes a belt 115c1, a driving roller 115c2, and a driven roller 115c3. The belt 115c1 is wound around the driving roller 115c2 and the driven roller 115c3. The drive roller 115c2 is connected to the second holding mechanism motor 114b and is driven by the second holding mechanism motor 114b. The driven roller 115c3 is connected to one end of the third layer shaft 136 of the frame shaft 130. When the second holding mechanism motor 114b is driven, the drive roller 115c2 rotates, the driven roller 115c3 rotates via the belt 115c1, and the third layer shaft 136 also rotates.

  The fourth transmission mechanism 115d includes a belt 115d1, a driving roller 115d2, and a driven roller 115d3. The belt 115d1 is wound around the driving roller 115d2 and the driven roller 115d3. The drive roller 115d2 is connected to one end (an end different from the side to which the driven roller 115c3 is connected) of the third layer shaft 136 of the frame shaft 130, and when the third layer shaft 136 rotates, the drive roller 115d2 also becomes. Rotate. The driven roller 115d3 is connected to one end of the second shaft 111b of the second holding mechanism 110b (the end portion on the side supported by the holding mechanism support frame 120). When the third layer shaft 136 rotates, the drive roller 115d2 rotates, the driven roller 115d3 rotates via the belt 115d1, and the second shaft 111b of the second holding mechanism 110b also rotates.

  With the configuration described above, when the second holding mechanism motor 114b is driven, the driving force of the second holding mechanism motor 114b is changed to the first via the third transmission mechanism 115c and the fourth transmission mechanism 115d. It is transmitted to the second shaft 111b of the second holding mechanism 110b, and the second shaft 111b is rotated. As a result, the second film F2 is fed from the second film roll FR2 mounted on the second shaft 111b of the second holding mechanism 110b.

(2-2-7) Joining Mechanism The joining mechanism 162 includes the first film F1 wound around the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a and the second holding mechanism 110b. This is a mechanism for joining the second film F2 wound around the second film roll FR2 mounted on the second shaft 111b. The joining mechanism 162 sandwiches the first film F1 and the second film F2 with the first guide member 119 or the second guide member (not shown), and heats them with a heater (not shown) while applying pressure to the first film F1 and the second film F2. This is a mechanism for thermally welding the first film F1 and the second film F2. However, the joining method is not limited to heat welding, and may be a mechanism for joining the first film F1 and the second film F2 by ultrasonic welding.

  When the second film F2 of the second film roll FR2 is used up, the joining mechanism 162 causes the second film wound around the second film roll FR2 mounted on the second shaft 111b of the second holding mechanism 110b. The terminal end portion F2T of F2 and the starting end portion F1L of the first film F1 wound around the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a are joined. In addition, when the first film F1 of the first film roll FR1 is used up, the joining mechanism 162 causes the first film wound around the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a. An end portion (not shown) of F1 and a starting end portion (not shown) of the second film F2 wound around the second film roll FR2 mounted on the second shaft 111b of the second holding mechanism 110b. To join.

(2-2-8) Starting End Position Adjusting Mechanism The starting end position adjusting mechanism 140 is wound around the film roll FR when the replacement film roll FR is mounted on the first holding mechanism 110a or the second holding mechanism 110b. It is a mechanism mainly used for adjusting the position of the starting end portion of the film F and the vicinity of the end portion of the film F formed. The starting end position adjusting mechanism 140 includes a starting end position adjusting sensor 142, a film temporary placement part 143, a temporary pressing mechanism 144, and an end position adjusting air nozzle 146 (see FIG. 8).

(2-2-8-1) Starting End Position Adjustment Sensor The starting end position adjustment sensor 142 includes the first shaft 111a of the first holding mechanism 110a and the second holding mechanism 110b arranged at the film roll setting position A1. Also, when the film roll FR is mounted on the second shaft 111b and the starting end portion of the film F wound around the film roll FR is set to the regular position, the starting end portion of the film F should be positioned at the regular position. It is a sensor for detecting. The regular position of the starting end of the film F means that when the holding mechanisms 110a and 110b set with the film roll FR located at the film roll setting position A1 are moved to the film roll standby position A3 by the moving mechanism 139, It means a position where the starting end portion of the film F is arranged at the joining position of the film F by the joining mechanism 162. The starting end portion position adjusting sensor 142 may directly detect that the starting end portion of the film F is located at the regular position, or a predetermined portion of the film F (a portion other than the starting end portion) may be a target position ( When the predetermined portion of the film F exists at that position, it may be detected that the starting end portion of the film F is arranged at the normal position).

  The starting end position adjusting sensor 142 is arranged above the film temporary placement part 143.

  The starting end position adjusting sensor 142 is, for example, a registration mark sensor that detects the registration mark M printed on the printing surface Fa of the film F. Here, the starting end portion position adjusting sensor 142 detects that the registration mark M is located at the target position (the detection position of the starting end portion position adjusting sensor 142), and the starting end portion of the film F is detected based on the detection result. Detects that is in the normal position.

  The type of the sensor 142 for adjusting the position of the starting end portion is not limited to the registration mark sensor, and may be a sensor using a camera, for example. For example, the starting end portion position adjusting sensor may detect that the starting end portion of the film F is located at the regular position based on the position of the print P on the printing surface Fa of the film F captured by the camera.

(2-2-8-2) Film temporary placement section The film temporary placement section 143 is used when the operator of the bag making and packaging machine 1000 attaches the replacement film roll FR to the holding mechanisms 110a and 110b, that is, the holding mechanism 110a. When the replacement film roll FR is mounted on the shafts 111a and 111b of the film rolls 110b, 110b, the vicinity of the starting end of the film F pulled out from the film roll FR is a member that is temporarily placed manually. The film temporary placement section 143 has a temporary placement surface 143 a on which the film F is temporarily placed.

  An example of the operation of setting the film F (first film F1) when the operator of the bag making and packaging machine 1000 attaches the replacement film roll FR (first film roll FR1) to the first holding mechanism 110a is used as an example. The contents related to the storage unit 143 will be further described. The setting operation of the film F (second film F2) performed when the replacement film roll FR (second film roll FR2) is attached to the second holding mechanism 110b is similar to the setting operation of the first film F1. Therefore, the description will be omitted.

  The operator of the bag making and packaging machine 1000 mounts the replacement first film roll FR1 on the first holding mechanism 110a, and then the first film F1 of the first film roll FR1 passes through the predetermined path. To guide you. Specifically, the operator mounts the first film roll FR1 on the first shaft 111a of the first holding mechanism 110a, and then the first film F1 pulled out from the first film roll FR1 is the upper surface of the first guide member 119. And guides the first film F1 so as to pass through between the fixed roller 112 and the movable roller 118 of the first film pressing mechanism 117. Further, the operator manually temporarily puts the vicinity of the start end portion of the film F pulled out from the film roll FR on the temporary placing surface 143a of the temporary film placing portion 143. Preferably, the operator may register the registration mark M printed on the printing surface F1a of the first film F1 near the end F1E of the first film F1 within a predetermined position range of the temporary film rest part 143 (for example, the first film F1). The first film F1 is temporarily placed on the temporary placement surface 143a of the temporary film placement portion 143 so as to be arranged within a position range of about 50 mm in the length direction of. It should be noted that the position of the film temporary placement section 143 is such that when the first film roll FR1 is attached to the first holding mechanism 110a, the registration mark M printed on the printing surface F1a of the first film F1 is set at a predetermined position of the film temporary placement section 143. If temporarily placed within the range, the starting end portion F1L of the first film F1 will be within the predetermined position range with respect to the regular position in the transport path along which the first film F1 is transported by the first holding mechanism motor 114a, as will be described later. It is preferably designed to be arranged. More preferably, the position of the film temporary placement section 143 is such that when the first film roll FR1 is attached to the first holding mechanism 110a, the registration mark M printed on the printing surface F1a of the first film F1 is provided on the film temporary placement section 143. If temporarily placed within the predetermined position range, in the transport path along which the first film F1 is transported by the first holding mechanism motor 114a, the starting end portion F1L of the first film F1 is located upstream of the regular position, and It is preferably designed so as to be arranged within a predetermined position range with respect to the regular position.

  In the present embodiment, the film F pulled out from the film roll FR of the holding mechanisms 110a and 110b arranged at the film roll setting position A1 has a non-printing surface Fb (first in FIG. 8) as shown in FIG. The non-printing surface F1b) of the film F1 is temporarily placed on the temporary film placing section 143 with the non-printing surface F1b) facing the temporary placing surface 143a of the temporary film placing section 143. In other words, in the present embodiment, the film F drawn from the film roll FR arranged at the film roll setting position A1 has its printing surface Fa facing upward (the side visible to the operator) as shown in FIG. In this state, the film is temporarily placed on the film temporary placement section 143. Therefore, it is easy for the operator to temporarily place the registration mark M at a predetermined position of the temporary film placing section 143. The film F drawn from the film roll FR of the holding mechanisms 110a and 110b arranged at the film supply position A2 has the non-printing surface Fb facing the back side, as shown in FIG. Therefore, if the operator performs a positioning operation for the film F drawn from the film roll FR of the holding mechanisms 110a and 110b arranged at the film supply position A2, the operation is likely to be complicated.

  In addition, when the first film F1 is temporarily placed so that the registration mark M near the end F1E of the first film F1 is located within a predetermined position range of the film temporary placement portion 143, the rear side from the film temporary placement portion 143 is located. If the length of the first film F1 extending to the front is too long, in order to prevent the first film F1 from being entangled with the device or the like in the film supply unit 100, the first film F1 on the rear side of the film temporary placement unit 143 is prevented. May be cut manually or automatically.

(2-2-8-3) Temporary Pressing Mechanism The temporary pressing mechanism 144 is arranged near the film temporary placement section 143. The temporary holding mechanism 144 is a mechanism that temporarily holds the film F when the film F is temporarily placed on the temporary film holding portion 143 in order to suppress positional displacement of the film F. The temporary pressing mechanism 144 temporarily presses the film F with a force that allows the film F to be conveyed when the holding mechanism motors 114a and 114b convey the film F as described later. Although not limited, the temporary pressing mechanism 144 temporarily presses the film F with the force of an elastic member such as a spring. The temporary pressing mechanism 144 may be manually operated, or may be driven so as to be automatically pressed temporarily by a button operation or the like.

(2-2-8-4) End Position Adjustment Air Nozzle The end position adjustment air nozzle 146 is moved by the moving mechanism 139 when the holding mechanisms 110a and 110b are moved from the film roll set position A1 to the film roll standby position A3. In other words, when the starting end of the film F is moved to the joining position by the joining mechanism 162, air is blown near the end on the starting end side of the film F to adjust the position near the end of the film F. The blowing of air from the end position adjusting air nozzle 146 is controlled by the end position adjusting air solenoid valve 146a (see FIG. 4).

  For example, the position adjustment near the end of the film F by the end position adjusting air nozzle 146 will be described by taking the position adjustment near the end of the first film F1 as an example.

  When the moving mechanism 139 rotates the holding mechanism support frame 120 counterclockwise by a predetermined angle in order to move the first holding mechanism 110a from the film roll setting position A1 to the film roll standby position A3, the end position adjustment is performed. The air nozzle 146 blows air forward on the printing surface F1a (rear surface) in the vicinity of the end F1E on the starting end portion F1L side of the first film F1. As a result, the position of the first film F1 is adjusted such that the first film F1 hangs downward from the first film pressing mechanism 117 without winding around the fixed roller 112 or the second film F2 used for bag making (FIG. 9).

(2-2-9) Terminal Position Adjustment / Film Bonding Mechanism Terminal position adjustment / film bonding mechanism 160 is for bonding mechanism 162, first clamp 163, second clamp 164, knife 166, pinch roller 168, terminal end position adjustment. The first sensor 152, the second sensor 154 for adjusting the end position, and the cooling air solenoid valve 161a are included (see FIGS. 4 and 9).

(2-2-9-1) Joining Mechanism The joining mechanism 162 holds the other end of the film F wound around the film roll FR mounted on one of the shafts 111a and 111b of the holding mechanisms 110a and 110b and the other. This is a mechanism for joining the starting end portion of the film F wound around the film roll FR mounted on the shafts 111b, 111a of the mechanisms 110b, 110a. The joining mechanism 162 is a mechanism for thermally welding the film F using a heater (not shown) as a heat source. However, the method of joining the film F is not limited to thermal welding, and for example, the film F may be joined by ultrasonic welding.

  For example, the joining mechanism 162 will be described with reference to FIG. 9. An end portion F2T of the second film F2 wound around the second film roll FR2 mounted on the second shaft 111b of the second holding mechanism 110b, The starting end portion F1L of the first film F1 wound around the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a is sandwiched between the guide member 119 fixed to the arm 122a. And heat-weld in the state.

(2-2-9-2) 1st clamp and 2nd clamp The 1st clamp 163 and the 2nd clamp 164 are along the conveyance route of the film F at the time of supplying the film F with respect to the bag making packaging part 200. Will be placed. The first clamp 163 and the second clamp 164 adjust the end portion of the film F of the used film roll FR to the joining position of the joining mechanism 162, and then adjust the end portion of the film F of the used film roll FR. It is a member for sandwiching and fixing the film F in order to suppress positional displacement. The operations of the first clamp 163 and the second clamp 164 (sandwiching / releasing the sandwiching of the film F) are controlled by operating / stopping the operation of the first clamp drive mechanism 163a and the second clamp drive mechanism 164a, respectively. The first clamp drive mechanism 163a and the second clamp drive mechanism 164a may use air pressure as a drive source, or may use a motor as a drive source.

(2-2-9-3) Knife The knife 166 is formed after the end portion of the film F of the used film roll FR and the start portion of the film F of the replacement film roll FR are joined by the joining mechanism 162. A member for cutting the unnecessary film F. Execution / stop of cutting by the knife 166 is controlled by operation / stop of the knife drive mechanism 166a. The knife drive mechanism 166a may use air pressure as a drive source, or may use a motor as a drive source.

  The film supply unit 100 has a knife operation detection sensor 166b for detecting that the knife 166 has operated (in this embodiment, the knife 166 has been driven downward to cut the film F). (See FIG. 3.) The knife operation detection sensor 166b may be arranged on the same side as the knife 166 (in the present embodiment, the upper side on which the film joining mechanism 160 and the like are arranged), or the first guide member 119 side. May be provided.

  The knife operation detection sensor 166b is, for example, a photoelectric sensor. However, the type of the knife operation detection sensor 166b may be any sensor that can detect the movement of the knife 166, and may be, for example, an inductive type or electrostatic capacitance type proximity sensor.

(2-2-9-4) Pinch roller The pinch roller 168 feeds the film F by sandwiching the film F with another fixed roller and rotating the pinch roller 168. The pinch roller 168 moves the end portion of the film F of the used film roll FR toward the film joining position where the joining mechanism 162 joins the starting end portion of the film F of the new replacement film roll FR. The pinch roller 168 that conveys the film F of the used film roll FR in the first direction D1 (see FIG. 9) is a mechanism that can change the conveyance speed of the film F.

  An example in which the second film roll FR2 is a used film roll FR and the first film roll FR1 is a new replacement film roll FR drawn in FIG. 9 will be described in detail.

  The pinch roller 168 adjusts the position of the end portion of the film F of the used film roll FR (here, the end portion F2T of the second film F2 of the second film roll FR2) and adjusts the position of the pinch roller air cylinder 168a. Thus, it is pressed against the fixed roller 112 of the first holding mechanism 110a (in FIG. 9, the fixed roller 112b of the three fixed rollers 112 which is arranged at the top). As a result, the second film F2 is sandwiched between the pinch roller 168 and the fixed roller 112b. In this state, the pinch roller driving mechanism 168b rotates the pinch roller 168 clockwise in the right side view (see the arrow in FIG. 9). The pinch roller drive mechanism 168b is, for example, a servo motor. When the pinch roller drive mechanism 168b rotates the pinch roller 168, the second film F2 is conveyed in the first direction D1 toward the second film roll FR2 side (in the direction opposite to the bag-making packaging operation). . The pinch roller 168 reaches a film joining position where the end portion F2T of the second film F2 of the second film roll FR2 is joined to the start end portion F1L of the first film F1 of the first film roll FR1 by the joining mechanism 162. Until then, the second film F2 of the second film roll FR2 is transported in the first direction D1. A mode of drive control of the pinch roller 168 by the pinch roller drive mechanism 168b will be described later.

(2-2-9-5) End Position Adjustment Sensor The end position adjustment first sensor 152 and the end position adjustment second sensor 154 are positioned on the film F of the used film roll FR. This is a sensor that detects the registration mark M for adjustment while the film F is being conveyed.

  The first end position adjusting sensor 152 and the second end position adjusting second sensor 154 are arranged along the conveyance path of the film F by the pinch roller 168. In particular, the first end position adjusting sensor 152 and the second end position adjusting second sensor 154 are arranged along the conveyance path of the film F on the side of the printing surface Fa of the film F conveyed by the pinch roller 168. ing. The second end position adjusting sensor 154 adjusts the position of the film F on the downstream side of the end position adjusting first sensor 152 in the transport direction (first direction D1) of the film F by the pinch roller 168. The registration mark M for use in the printing is detected.

  The position where the first end position adjusting first sensor 152 detects the registration mark M attached to the film F and the second end position adjusting second sensor 154 when viewed along the conveyance path of the film F by the pinch roller 168. The distance from the position where the registration mark M attached to the film F is detected is preferably 10 mm or more and 90 mm or less.

  The first end position adjusting sensor 152 and the second end position adjusting sensor 154 are, for example, registration mark sensors. However, the types of the first end position adjusting sensor 152 and the second end position adjusting second sensor 154 are not limited to the registration mark sensor, and may be a sensor using a camera, for example. For example, the first sensor for adjusting the position of the end portion and the second sensor for adjusting the position of the end portion each capture an image of the printing surface Fa of the film F conveyed by the camera, and the registration mark M or the printing P of the printing surface Fa of the film F is printed. May be detected as a mark for position adjustment.

  A mode of driving control of the pinch roller 168 by the pinch roller driving mechanism 168b using the first end position adjusting sensor and the second end position adjusting second sensor will be described later.

(2-2-9-6) Cooling Air Solenoid Valve The cooling air solenoid valve 161a is an electromagnetic valve for controlling execution / stop of blowing air from the air outlet 161 formed near the joining mechanism 162. It is a valve. The air blown out from the air outlet 161 cools the joint portion of the film F by the joint mechanism 162.

(2-3) Controller The controller 300 controls the operation of each unit of the bag making and packaging machine 1000 (various configurations of the bag making and packaging unit 200 and the film supply unit 100).

  The controller 300 has a microcomputer having components such as a CPU and a memory. In the controller 300, the CPU reads and executes the program stored in the memory to control the operation of each unit of the bag making and packaging machine 1000.

  The controller may realize the same function as the function of the controller 300 of the present embodiment by hardware such as a logic circuit or a combination of hardware and software.

  The controller 300 is electrically connected to each unit of the bag making and packaging machine 1000, for example, the film transport belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240 of the bag making and packaging unit 200. Further, the controller 300 includes a frame rotation motor 138, a first holding mechanism motor 114a, a second holding mechanism motor 114b, an air cylinder 118a, a start end position adjusting sensor 142, and a end position adjusting motor of the film supply unit 100. Air solenoid valve 146a, joining mechanism 162, first clamp driving mechanism 163a, second clamp driving mechanism 164a, knife driving mechanism 166a, pinch roller air cylinder 168a, pinch roller driving mechanism 168b, end portion position adjusting first sensor 152. The second end position adjusting second sensor 154, the cooling air solenoid valve 161a, the movable roller mechanism air cylinder 187, and the encoder 188 are electrically connected.

  The controller 300 receives the detection results of the starting end position adjusting sensor 142, the ending position adjusting first sensor 152, and the ending position adjusting second sensor 154. Further, the controller 300 receives the detection result of the encoder 188 (the rotation angle of the shaft 184a connected to the fixed arm 186 of the movable roller 185). The detection result of the encoder 188 is used to control the position of the movable roller 185. Further, the detection result of the encoder 188 may be used for detecting the end of the film roll FR, which will be described later.

(3) Control of operation of bag making and packaging machine 1000 by controller (3-1) Normal operation During normal operation in which the bag making and packaging unit 200 performs bag making and packaging operation, the controller 300 makes each part of the bag making and packaging machine 1000, for example, The operation of the holding mechanism motors 114a and 114b of the film feeding mechanism 116, the movable roller mechanism air cylinder 187, the film transport belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240 is controlled as follows. .

  The controller 300 uses the holding mechanism motors 114a and 114b of the film feeding mechanism 116 to move the sheet-shaped film F drawn from the film roll FR at a predetermined speed (a speed determined by the operating load of the bag making and packaging machine 1000 or the like). The film transport belt 220 is controlled so as to be transported. The bag-making and packaging machine 1000 is operated in such a manner that continuous operation of continuously transporting the film F (cylindrical film Ft) at a constant speed and transport / stop of the film F (cylindrical film Ft) are repeated alternately. There is intermittent operation. The operating method of the bag making and packaging machine 1000 is appropriately selected according to operating conditions.

  The controller 300 activates / stops the holding mechanism motors 114a and 114b of the film feeding mechanism 116 and controls the holding mechanism motors 114a and 114b of the film feeding mechanism 116 based on the conveyance state of the film F and the detection result of the encoder 188. The rotation speed of the film roll FR is controlled. That is, the controller 300 controls the film feeding mechanism 116 to change the feeding speed of the film F during the bag making and packaging operation in the bag making and packaging unit 200.

  For example, the controller 300 activates / stops the holding mechanism motors 114a and 114b of the film feeding mechanism 116 that feeds the film F at the timing of operating / stopping the film transport belt 220. In other words, the controller 300 changes the delivery speed of the film F by the holding mechanism motors 114a and 114b of the film delivery mechanism 116 based on the transport speed of the film transport belt 220 during the bag making and packaging operation in the bag making and packaging unit 200. To do.

  Further, the controller 300 controls the rotation speeds of the shafts 111a and 111b holding the film roll FR by the holding mechanism motors 114a and 114b of the film feeding mechanism 116 based on the detection result of the encoder 188. In other words, the controller 300 uses the holding mechanism motors 114a and 114b of the film feeding mechanism 116 based on the detection result of the encoder 188, that is, the position of the movable roller 185 during the bag making and packaging operation in the bag making and packaging unit 200. Change the feeding speed of.

  Further, the controller 300 controls the movable roller mechanism air cylinder 187 so that the movable roller 185 exerts a constant force on the film F being conveyed.

  Further, the controller 300 includes a vertical sealing mechanism 230 and a vertical sealing mechanism 230 so that the vertical sealing mechanism 230 vertically seals the tubular film Ft at a predetermined timing and the horizontal sealing mechanism 240 horizontally seals the tubular film Ft at a predetermined timing. It controls the operation of the lateral seal mechanism 240.

(3-2) Automatic splicing operation of film rolls Hereinafter, an operation related to automatic splicing (automatic joining) of the film rolls FR of the bag making and packaging machine 1000 will be described.

(3-2-1) Setting Operation of Replacement Film Roll The operation of the operator and the operation of the bag making and packaging machine 1000 when setting the replacement film roll FR on the holding mechanisms 110a and 110b will be described.

  Note that, here, the operation of the operator and the operation of the bag making and packaging machine 1000 when setting the first film roll FR1 on the first holding mechanism 110a will be described as an example. The operation of setting the second film roll FR2 on the second holding mechanism 110b is the same as the operation of setting the first film roll FR1 on the first holding mechanism 110a, and therefore description thereof is omitted here.

  First, the operator mounts the first film roll FR1 on the first shaft 111a of the first holding mechanism 110a arranged at the film roll setting position A1. Next, the operator pulls out the first film F1 from the first film roll FR1, moves the first film F1 along the upper surface of the first guide member 119, and then the fixed roller 112 and the movable roller 118 of the first film pressing mechanism 117. The first film F1 is guided so as to pass between the first film F1 and the second film F1. Further, the operator manually temporarily puts the vicinity of the start end portion of the film F pulled out from the film roll FR on the temporary placing surface 143a of the temporary film placing portion 143. Preferably, the operator places the registration mark M printed on the printing surface F1a of the first film F1 near the end F1E of the first film F1 within a predetermined position range of the film temporary placement section 143. The first film F1 is temporarily placed on the temporary placement surface 143a of the temporary film placement unit 143. Next, the operator operates the temporary pressing mechanism 144 to temporarily press the first film F1 temporarily placed on the temporary placing surface 143a of the film temporary placing section 143. After that, the operator operates the switch 102 provided on the back side of the film supply unit 100 to instruct the controller 300 to align the starting end portion F1L of the first film F1.

  If the operator presses the switch 102 while the first film F1 is not properly set on the first holding mechanism 110a (for example, the first film roll FR1 is not mounted on the first shaft 111a). This can be detected by the change in the torque of the first holding mechanism motor 114a, which is a servo motor. That is, the bag making and packaging machine 1000 can detect that the first film F1 is not properly set in the first holding mechanism 110a without providing a separate sensor.

  The controller 300 operates the connecting mechanism 111a1 of the first shaft 111a to connect / fix the first film roll FR1 to the first shaft 111a in response to an instruction to align the starting end portion F1L of the first film F1. Further, the controller 300 drives the air cylinder 118a to press the movable roller 118 against the fixed roller 112 (particularly, the central fixed roller 112a) to sandwich the first film F1 between the fixed roller 112 and the first film F1. Hold down. As a result, the displacement of the first film F1 is suppressed. The first film F1 can be conveyed by the first holding mechanism motor 114a even when the movable roller 118 holds the first film F1. Next, the controller 300 rotates the first holding mechanism motor 114a of the film feeding mechanism 116 to rotate the first shaft 111a counterclockwise in right side view. As a result, the first film F1 is wound around the first film roll FR1 and the end F1E of the first film F1 is conveyed to the starting end position adjustment sensor 142 side. The controller 300 prints on the printing mark F1a of the first film F1 existing in the vicinity of the registration mark M attached to the first film F1 to which the leading end position adjusting sensor 142 is conveyed (the first film F1 existing near the end F1E of the first film F1). When the registration mark M) is detected, the conveyance of the first film F1 by the first holding mechanism motor 114a is stopped. In this state, the starting end portion F1L of the first film F1 is arranged at the regular position. The positional deviation of the first film F1 after the start end portion F1L of the first film F1 is adjusted to the regular position is suppressed by the first film F1 being pressed by the movable roller 118. In summary, the controller 300 causes the motor 114a for the first holding mechanism to rotate the first film roll FR1 after the vicinity of the start end portion F1L of the first film F1 is temporarily placed on the film temporary placement portion 143. The first film F1 is transported along a predetermined transport path. The controller 300 conveys the first film F1 along a predetermined conveyance path until the starting end portion position adjusting sensor 142 detects that the starting end portion F1L of the first film F1 is located at the regular position.

  With the above, the controller 300 finishes the alignment of the starting end portion F1L of the first film F1.

  Next, the moving mechanism 139 causes the joining mechanism 162 to move the starting end portion F1L of the first film F1 of the first film roll FR1 mounted on the shaft 111a of the first holding mechanism 110a onto the shaft 111b of the second holding mechanism 110b. The first holding mechanism 110a is moved from the film roll setting position A1 to the film roll standby position A3 before being connected to the end portion F2T of the second film F2 of the mounted second film roll FR2. The film roll standby position A3 is a position rotated around the frame shaft 130 from the film roll set position A1 by a predetermined angle. In other words, the controller 300 controls the moving mechanism 139 (controls the frame rotation motor 138) to support the holding mechanism so that the starting end portion F1L of the first film F1 is arranged at the joining position by the joining mechanism 162. The frame 120 is rotated by a predetermined angle to move the first holding mechanism 110a from the film roll setting position A1 to the film roll standby position A3. The first holding mechanism 110a, which has been moved to the film roll standby position A3, does not particularly operate until the end of the second film F2 of the second film roll FR2 of the second holding mechanism 110b is detected, Wait on the spot.

  When the first holding mechanism 110a is moved from the film roll setting position A1 to the film roll standby position A3 by the moving mechanism 139, the second holding mechanism 110b is moved from the film supply position A2 to the film supply position A4. The controller 300 detects, by the encoder 188, a defect such as a slack of the second film F2 or a tension acting on the film F2 deviating from an appropriate value due to the movement of the second holding mechanism 110b to the film supply position A4. The second holding mechanism motor 114b of the film feeding mechanism 116 and the like are controlled so as to eliminate the detected inconvenience based on the detection result by detecting the change in the position of the movable roller 185.

  The controller 300 controls the terminal position adjusting air solenoid valve 146a to move the terminal position adjusting air nozzle 146 when the first holding mechanism 110a is moved from the film roll setting position A1 to the film roll standby position A3. Therefore, it is preferable to adjust the position of the first film F1 in the vicinity of the end F1E by blowing air to the vicinity of the end F1E on the side of the starting end portion F1L of the first film F1. The mode of position adjustment near the end F1E of the first film F1 is as described above.

  Further, the film feeding mechanism 116, when the moving mechanism 139 is moved to the film roll standby position A3 by rotating the first holding mechanism 110a around the frame shaft 130 from the film roll setting position A1 by a predetermined angle, The first shaft 111a of the first holding mechanism 110a is rotated in the same direction as the rotation direction of the first holding mechanism 110a by an angle corresponding to a predetermined angle (for example, the same angle as the predetermined angle). By performing such control, the first holding member 111a and the second layer shaft 134 of the frame shaft 130 are connected to each other via the belt 115b1 of the second transmission mechanism 115b. It is possible to suppress slackening of the first film F1 that occurs when the mechanism 110a rotates. By suppressing the slack of the first film F1 as described above, it is possible to suppress the occurrence of defects such as the displacement of the position of the starting end portion F1L of the first film F1.

(3-2-2) Operation Regarding Automatic Splicing of Film End of Used Film Roll and Starting End of Replacement Film Roll The operation of the bag making and packaging machine 1000 regarding automatic splicing of the film roll FR will be described. Here, a case where the second film roll FR2 is a used film roll (a film roll used for bag making and packaging) and the first film roll FR1 is a replacement film roll will be described as an example. Even when the first film roll FR1 is a used film roll and the second film roll FR2 is a replacement film roll, the second film roll FR2 is a used film roll and the first film roll FR1 is a replacement film. Also in the case of a roll, the operation when the film F of the used film roll FR is joined to the film F of the replacement film roll FR is the same. Therefore, here, for simplification of the specification, description of the case where the first film roll FR1 is a used film roll and the second film roll FR2 is a replacement film roll is omitted.

  The automatic joining of the film rolls FR is triggered by the detection of the end of the film rolls FR being used.

  The controller 300 detects the end of the second film roll FR2 based on the detection result of the encoder 188, for example. The controller 300 determines the end of the second film roll FR2 based on the physical quantity related to the position of the movable roller 185 detected by the encoder 188, specifically, the rotation angle of the shaft 184a to which the arm 186 to which the movable roller 185 is fixed is connected. To detect.

  During normal operation of the bag making and packaging machine 1000, the position of the movable roller 185 is controlled to a predetermined position (predetermined region). However, at the end of the film roll FR, the film F cannot be further pulled out from the film roll FR. Therefore, even if the controller 300 controls the operation of each part of the bag making and packaging machine 1000, the movable roller 185 is lifted to the film F. And moves upward beyond a predetermined area. Therefore, the controller 300 determines whether the rotation angle of the shaft 184a detected by the encoder 188 exceeds a predetermined threshold value (whether the arm 186 rotates to a position that cannot be taken during normal operation). Then, the controller 300 detects the end of the film roll FR when the rotation angle of the shaft 184a exceeds a predetermined threshold value.

  In the present embodiment, the encoder 188 is used as a sensor to detect the end of the film roll FR, but the present invention is not limited to this mode. For example, in another embodiment, the photoelectric sensor 190 (see FIG. 2) arranged near the film supply positions A2 and A4 has an end mark (not shown) indicating the end of the film roll FR attached to the film F. The end of the film roll FR may be detected by the detection (the photoelectric sensor 190 is omitted in FIG. 4). Further, for example, the end of the film roll FR may be detected by detecting the film F using a camera or a sensor (not shown) arranged near the film supply positions A2 and A4.

  The controller 300 stops the operation of the film transport belt 220, the vertical seal mechanism 230, and the horizontal seal mechanism 240 when a sensor such as the encoder 188 or the photoelectric sensor 190 detects the end of the film roll FR. Further, the controller 300 stops the operation of the second holding mechanism motor 114b of the film feeding mechanism 116 when a sensor such as the encoder 188 or the photoelectric sensor 190 detects the end of the film roll FR.

  The controller 300 drives the pinch roller air cylinder 168a to move the pinch roller 168 to the fixed roller of the first holding mechanism 110a when a sensor such as the encoder 188 or the photoelectric sensor 190 detects the end of the film roll FR. The second film F2 is pressed against one (fixed roller 112b) 112, and the second film F2 is sandwiched between the pinch roller 168 and the fixed roller 112b. Further, the controller 300 drives the pinch roller drive mechanism 168b in the clockwise direction as shown in FIG. 9 when viewed from the right side, so that the first direction D1 of the second film F2 (the reverse direction of the transport direction of the film F during the normal operation). Direction) is started. Among the fixed rollers 112 of the first holding mechanism 110a, the fixed roller 112c, which is arranged at the lowermost position and the uppermost position in the state depicted in FIG. 9, is used as a guide when the second film F2 is conveyed by the pinch roller 168. It

  At this time, the controller 300 continues to move the second film at the transport speed V1 in the first direction D1 until the terminal position adjusting first sensor 152 detects the registration mark M printed on the printing surface F2a of the second film F2. The pinch roller drive mechanism 168b is controlled so as to convey F2. After the end portion position adjusting first sensor 152 detects the registration mark M, the controller 300 conveys the second film F2 in the first direction D1 at the conveying speed V2. When the second end position adjusting second sensor 154 detects the registration mark M, the controller 300 determines that the end part F2T of the second film F2 has reached the film joining position where joining is performed by the joining mechanism 162. Then, the controller 300 controls to stop the pinch roller drive mechanism 168b in order to stop the conveyance of the second film F2 by the pinch roller 168. It should be noted that the above-described transport speed V1 and transport speed V2 have a relationship of transport speed V1> transport speed V2. For example, without limitation, the transport speed V1 is twice or more the transport speed V2. That is, in the present embodiment, the controller 300 determines that the conveying speed V1 of the second film F2 by the pinch roller 168 before the first end position adjusting first sensor 152 detects the registration mark M is the first end position adjusting first. The pinch roller 168 (more specifically, the pinch roller driving mechanism 168b) is controlled so as to be faster than the conveyance speed V2 of the second film F2 by the pinch roller 168 after the detection of the registration mark M by the sensor 152.

  When the second end position adjusting second sensor 154 detects the registration mark M printed on the printing surface F2a of the second film F2 and the conveyance of the second film F2 by the pinch roller 168 is stopped based on this, The end portion F2T of the second film F2 is moved to the joining position by the joining mechanism 162. In this state, the controller 300 drives the first clamp drive mechanism 163a and the second clamp drive mechanism 164a to suppress the positional deviation of the terminal end portion F2T of the second film F2, and the first clamp 163 and the second clamp 164. Press the second film F2 with. Moreover, the controller 300 controls the joining mechanism 162 to join the terminal end portion F2T of the second film F2 and the starting end portion F1L of the first film F1. For example, the controller 300 drives the first clamp drive mechanism 163a and the second clamp drive mechanism 164a, and joins the end portion F2T of the second film F2 and the start end portion F1L of the first film F1 by the joining mechanism 162. Execute at approximately the same timing. Next, the controller 300 drives the knife drive mechanism 166a to cut the film F with the knife 166 in order to separate the unnecessary first film F1 and second film F2 from the film F used for normal operation.

  Next, in preparation for normal operation, the controller 300 controls the second clamp drive mechanism 164a to release the pressing of the second film F2 by the second clamp 164. Further, the controller 300 controls the cooling air solenoid valve 161a to blow air from the air outlet 161 to the joint portion between the first film F1 and the second film F2. Further, the controller 300 controls the first clamp drive mechanism 163a to release the pressing of the film F by the first clamp 163. Further, the controller 300 controls the pinch roller air cylinder 168a so that the pinch roller 168 separates from the fixed roller 112b, and releases the pressing of the film F by the pinch roller 168.

  Then, the controller 300 moves the first holding mechanism 110a located at the film roll standby position A3 to the film supply position A2 by the moving mechanism 139, and moves the film transport belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240. Operate and return to normal operation. When the first holding mechanism 110a is moved to the film supply position A2, the second holding mechanism 110b is moved to the film roll setting position A1. Then, a new (replacement) second film roll FR2 may be set in the second holding mechanism 110b.

(4) Features (4-1)
The bag making and packaging machine 1000 of the above embodiment includes the bag making and packaging unit 200 and the film supply unit 100. The bag making and packaging unit 200 forms a sheet-shaped film F into a tubular shape and seals the tubular film Ft to form a bag-like shape. The film supply unit 100 holds the film roll FR on which the sheet-shaped film F is wound, and supplies the film F fed from the film roll FR to the bag making and packaging unit 200. The film supply unit 100 includes a first holding mechanism 110a and a second holding mechanism 110b as an example of a plurality of film roll holding mechanisms, a holding mechanism support frame 120 as an example of a frame, a frame shaft 130, and a moving mechanism 139. And a joining mechanism 162 and a film feeding mechanism 116. The first holding mechanism 110a has a first shaft 111a to which the film roll FR is mounted and which rotatably holds the mounted film roll FR. The second holding mechanism 110b has a second shaft 111b to which the film roll FR is mounted and which rotatably holds the mounted film roll FR. The holding mechanism support frame 120 supports the first holding mechanism 110a and the second holding mechanism 110b. The frame shaft 130 rotatably supports the holding mechanism support frame 120. The moving mechanism 139 rotates the holding mechanism support frame 120 so that each of the first holding mechanism 110a and the second holding mechanism 110b supplies at least a film roll set position A1 and a film supply different from the film roll set position A1. It is moved between position A2 and. The film roll setting position A1 is an example of the first position. The film supply position A2 is an example of the second position. At the film roll setting position A1, the film roll FR is mounted on the shafts 111a and 111b. At the film supply position A2, the film F is delivered from the film roll FR mounted on the shafts 111a and 111b to the bag making and packaging unit 200. The joining mechanism 162 includes the end portion of the film F wound around the film roll FR mounted on the shafts 111a and 111b of the one holding mechanism 110a and 110b, and the shafts 111b and 111a of the other one holding mechanism 110b and 110a. The starting end portion of the film F wound around the film roll FR attached to is joined to the film roll FR. For example, referring to FIG. 8, the joining mechanism 162 includes the end portion F2T of the second film F2 wound around the second film roll FR2 mounted on the shaft 111b of the second holding mechanism 110b and the end portion F2T. The first end F1L of the first film F1 wound around the first film roll FR1 mounted on the first shaft 111a of the first holding mechanism 110a is joined. The film feeding mechanism 116 rotates the shafts 111a and 111b of the plurality of holding mechanisms 110a and 110b, respectively, and independently from the film rolls FR attached to the shafts 111a and 111b of the plurality of holding mechanisms 110a and 110b. Roll out film F. The film feeding mechanism 116 changes the feeding speed of the film F during the bag making and packaging operation in the bag making and packaging unit 200.

  In the bag making and packaging machine 1000 of the present embodiment, the film roll FR is mounted on the shaft at the same film roll setting position A1 and moved to another position by the moving mechanism 139. Therefore, the work burden on the operator of the bag making and packaging machine 1000 can be suppressed.

  Further, in the bag making and packaging machine 1000, since the feeding speed of the film roll FR during the bag making and packaging operation is variable, an efficient bag making and packaging machine can be realized.

(4-2)
In the bag making and packaging machine 1000 of the present embodiment, the frame shaft 130 has a multilayer shaft structure. The moving mechanism 139 includes a frame rotation motor 138 that is an example of a first motor and a frame rotation transmission mechanism 137 that is an example of a first transmission mechanism. The frame rotation motor 138 rotates the holding mechanism support frame 120. The frame rotation transmission mechanism 137 transmits the driving force of the frame rotation motor 138 to the first layer shaft 132 as an example of the first layer shaft of the frame shaft 130.

  The film feeding mechanism 116 includes a first holding mechanism motor 114a as an example of a second motor, a first transmission mechanism 115a as an example of a second transmission mechanism, and a second transmission mechanism 115b as an example of a third transmission mechanism. And. The first holding mechanism motor 114a rotates the first shaft 111a of the first holding mechanism 110a among the plurality of holding mechanisms 110a and 110b. The first transmission mechanism 115a transmits the driving force of the first holding mechanism motor 114a to the second layer shaft 134, which is an example of the second layer shaft of the frame shaft 130. The second transmission mechanism 115b transmits the driving force transmitted to the second layer shaft 134 of the frame shaft 130 to the first shaft 111a of the first holding mechanism 110a to be driven by the first holding mechanism motor 114a.

  The film feeding mechanism 116 includes a second holding mechanism motor 114b as an example of a second motor, a third transmission mechanism 115c as an example of a second transmission mechanism, and a fourth transmission as an example of a third transmission mechanism. Mechanism 115d. The second holding mechanism motor 114b rotates the second shaft 111b of the second holding mechanism 110b among the plurality of holding mechanisms 110a and 110b. The third transmission mechanism 115c transmits the driving force of the second holding mechanism motor 114b to a third layer shaft 136 as an example of the second layer shaft of the frame shaft 130. The fourth transmission mechanism 115d transmits the driving force transmitted to the third layer shaft 136 of the frame shaft 130 to the second shaft 111b of the second holding mechanism 110b to be driven by the second holding mechanism motor 114b.

  In this bag making and packaging machine 1000, a multilayer shaft structure is adopted for the frame shaft 130 whose position does not change due to the rotation of the holding mechanism support frame 120, and the shafts 111a and 111b of the holding mechanisms 110a and 110b are inserted through the frame shaft 130. It is configured to transmit the driving force of the holding mechanism motors 114a and 114b. Therefore, when moving the holding mechanisms 110a and 110b, it is not necessary to move the holding mechanism motors 114a and 114b that drive the shafts 111a and 111b. Therefore, the film roll FR can be mounted at the same position with a simple structure.

(4-3)
In the bag making and packaging machine 1000 according to the present embodiment, the film supply unit 100 has a movable roller 185 that is arranged in the transport path of the film F fed from the film roll FR and that applies tension to the film F. The film feeding mechanism 116 changes the feeding speed of the film F based on the position of the movable roller 185 during the bag making and packaging operation in the bag making and packaging unit 200.

  In the bag making and packaging machine 1000, since the feeding speed of the film F is adjusted according to the position of the movable roller 185, high speed bag making can be realized.

(4-4)
In the bag making and packaging machine 1000 of the present embodiment, the bag making and packaging unit 200 has a film conveying belt 220 as an example of a film conveying mechanism that conveys the film F. The film feeding mechanism 116 changes the feeding speed of the film F based on the feeding speed of the film F of the film feeding belt 220 during the bag making and packaging operation in the bag making and packaging unit 200.

  For example, the film delivery mechanism 116 changes the delivery speed of the film F in accordance with the acceleration / deceleration of the transport speed of the film F by the film transport belt 220 when the film transport belt 220 intermittently transports the film F.

  In the bag making and packaging machine 1000, the feeding speed of the film F from the film roll FR is appropriately adjusted according to the feeding speed of the film F of the film feeding belt 220 on the bag making and packaging unit 200 side. Is feasible.

(4-5)
In the bag making and packaging machine 1000 of the present embodiment, the moving mechanism 139 causes the joining mechanism 162 to change the starting end portion of the film F of the film roll FR mounted on the shafts 111a and 111b of the one holding mechanism 110a and 110b to another one. Before being connected to the end portion of the film F of the film roll FR mounted on the shafts 111b and 111a of the holding mechanisms 110b and 110a, the holding mechanism 110a and 110b of 1 is set to the film roll set position around the frame shaft 130. It is moved from A1 to a film roll standby position A3 rotated by a predetermined angle. When the moving mechanism 139 moves the one holding mechanism 110a, 110b from the film roll setting position A1 to the film roll standby position A3, the film feeding mechanism 116 causes the shaft 111a, 111b of the holding mechanism 110a, 110b to move to the above-mentioned one. The holding mechanisms 110a and 110b are rotated by an angle corresponding to the above-mentioned predetermined angle (an angle at which the film F is not loosened). For example, when the moving mechanism 139 moves the one holding mechanism 110a, 110b from the film roll setting position A1 to the film roll standby position A3, the film feeding mechanism 116 causes the shafts 111a, 111b of the holding mechanisms 110a, 110b to move, The holding mechanism 110a, 110b is rotated in the same direction as the predetermined direction by the same angle as the predetermined angle.

  In the bag making and packaging machine 1000, in order to bond the film F, one holding mechanism 110a, 110b holding the replacement film roll FR is rotated by a predetermined angle from the film roll set position A1 to the film roll standby position A3. When being moved, the shafts 111a and 111b are rotated by the moving mechanism 139 in the same direction as the rotation directions of the holding mechanisms 110a and 110b by an angle corresponding to the predetermined angle. Therefore, it is possible to eliminate the slack of the film F caused by the rotation of the holding mechanisms 110a and 110b, and to suppress the positional deviation of the film F and the trouble of the conveyance caused by the slack of the film F.

(5) Modifications Modifications of this embodiment will be described below. The modified examples may be appropriately combined as long as they do not conflict with each other.

(5-1) Modification A
In the above embodiment, the alignment of the starting end portion of the film of the replacement film roll is automatically performed by the bag making and packaging machine 1000, but is not limited to this, and the starting end portion of the film of the replacement film roll is not limited to this. The alignment may be done manually.

(5-2) Modification B
In the above embodiment, the alignment of the end portion of the film of the used film roll is performed by using the two end portion position adjustment sensors, but the present invention is not limited to this, and the alignment of the film of the replacement film roll is performed. The alignment of the start end portion may be performed using a single end portion position adjustment sensor (without changing the transport speed of the film F in the first direction D1).

(5-3) Modification C
In the above embodiment, the bag making and packaging machine 1000 has the two holding mechanisms 110a and 110b, but the present invention is not limited to this and may have three or more holding mechanisms.

(5-4) Modification D
The holding mechanism motors 114a and 114b that rotate the shafts 111a and 111b of the holding mechanisms 110a and 110b may be motors that directly rotate the shafts 111a and 111b. However, when the shafts 111a and 111b are directly rotated, since the holding mechanism motors 114a and 114b need to be moved along with the movement of the holding mechanisms 110a and 110b, from the viewpoint of simplification of wiring and assembly, It is preferably configured as in the above embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to bag making and packaging machines and is useful.

100 film supply unit 110a first holding mechanism (film roll holding mechanism)
110b Second holding mechanism (film roll holding mechanism)
111a 1st shaft (shaft)
111b Second shaft (shaft)
114a First holding mechanism motor (second motor)
114b Second holding mechanism motor (second motor)
115a First transmission mechanism (second transmission mechanism)
115b Second transmission mechanism (third transmission mechanism)
115c Third transmission mechanism (second transmission mechanism)
115d Fourth transmission mechanism (third transmission mechanism)
116 film feeding mechanism 120 holding mechanism supporting frame (frame)
130 frame shaft 137 frame rotation transmission mechanism (first transmission mechanism)
138 Frame rotation motor (first motor)
139 Moving mechanism 162 Joining mechanism 185 Movable roller 200 Bag making packaging section 220 Film transport belt (film transport mechanism)
1000 Bag making and packaging machine A1 Film roll setting position (1st position)
A2 film supply position (2nd position)
A3 film roll standby position (3rd position)
F film F1L start end F1E end F2T end end FR film roll

JP, 2008-127091, A

Claims (5)

A sheet-shaped film is formed into a tubular shape, the tubular film is sealed to form a bag, and a bag-making packaging unit,
A film supply unit that holds the film roll in which the sheet-shaped film is wound, and supplies the film fed from the film roll to the bag-making packaging unit,
A bag making and packaging machine comprising:
The film supply unit,
Each is equipped with the film roll, having a shaft for rotatably holding the mounted film roll, a plurality of film roll holding mechanism,
A frame that supports the plurality of film roll holding mechanisms,
A frame shaft for rotatably supporting the frame,
By rotating the frame, each of the film roll holding mechanisms has at least a first position where the film roll is mounted on the shaft, and the film roll mounted on the shaft, which is different from the first position. From a second position where the film is fed from the bag to the bag making and packaging section, and a moving mechanism,
One end of the film wound around the film roll mounted on the shaft of the film roll holding mechanism, and the other end of the film roll mounted on the shaft of the film roll holding mechanism. A joining mechanism that joins the rotated starting end portion of the film,
Rotating each shaft of the plurality of film roll holding mechanism, from the film roll mounted on the shaft of the plurality of film roll holding mechanism, a film feeding mechanism that independently feeds the film,
Have
The film payout mechanism changes the payout speed of the film during bag making and packaging operation in the bag making and packaging unit,
Bag making and packaging machine. The frame shaft has a multilayer shaft structure,
The moving mechanism includes a first motor that rotates the frame, and a first transmission mechanism that transmits the driving force of the first motor to the axis of the first layer of the frame shaft.
The film feeding mechanism includes a second motor for rotating the shaft of one of the film roll holding mechanisms of the plurality of film roll holding mechanisms, and a driving force of the second motor for driving the second motor of the frame shaft. A second transmission mechanism for transmitting to the shaft of the layer, and a driving force transmitted to the shaft of the second layer of the frame shaft to the shaft of the film roll holding mechanism to be driven by the second motor. And a third transmission mechanism that
The bag making and packaging machine according to claim 1. The film supply unit is arranged in a transport path of the film fed from the film roll, and further has a movable roller that applies tension to the film,
The film feeding mechanism changes the feeding speed of the film based on the position of the movable roller during bag making and packaging operation in the bag making and packaging unit.
The bag making and packaging machine according to claim 1 or 2. The bag making and packaging unit has a film transport mechanism for transporting the film,
The film feeding mechanism, during bag making and packaging operation in the bag making and packaging unit, based on the transport speed of the film of the film transport mechanism, to change the payout speed of the film,
The bag making and packaging machine according to any one of claims 1 to 3. In the moving mechanism, a start end portion of the film of the film roll mounted on the shaft of the first film roll holding mechanism is mounted on the shaft of the second film roll holding mechanism by the joining mechanism. The first film roll holding mechanism is moved to the third position rotated by a predetermined angle from the first position around the frame shaft before being connected to the end portion of the film of the film roll. Let
When the moving mechanism moves the first film roll holding mechanism from the first position to the third position, the film feeding mechanism moves the shaft of the first film roll holding mechanism to In the same direction as the rotation direction of the first film roll holding mechanism by the moving mechanism, by an angle corresponding to the predetermined angle,
The bag making and packaging machine according to any one of claims 1 to 4.

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